Checking tire pressure

[cmdl]

Hi all,
This is probably a silly question but I'm curious. I check my tire pressure in the morning since they are coldest at that time. If they need air, I inflate them to, or very little over, the recommended 30 PSI.
My question: If I move my car a bit (say 20 feet) and then check the tire pressure, does that make a difference? The tires should still be cold, right?

[Dave B.]

It takes several miles for the tires to really 'heat up'. Just moving the car in the driveway should have NO effect.

[cmdl]

Thanks.

[carbuilder2002]

As long as the tyre is not warm to the touch it will be fine or rather warmer than before being moved.

[Thomas Sams]

Tire is warm when was you come back for the driving but i think its not big problem for the new tires some times when you go for the driving after come back in tire pressure of air is decreased why this thing happened?

[Jensen91]

yeah it does make a difference..but not enough to be measured on a pressure gauge..
If your vehicle is equipped with an r14-r16 tires (along with 165,175)..the recommended pressure is 32psi..

[shorod]

Originally Posted by Jensen91

yeah it does make a difference..but not enough to be measured on a pressure gauge..
If your vehicle is equipped with an r14-r16 tires (along with 165,175)..the recommended pressure is 32psi..

Recommended tire pressure is what is recommended by the vehicle manufacturer and will be listed on either a door tag/door sill tag or sometimes it's found inside the fuel filler door. The recommended pressure IS NOT what's on the tire sidewall. This is a common misunderstanding. Without knowing the vehicle details one cannot say what the recommended pressure is.

-Rod

[canakin]

Originally Posted by shorod

Recommended tire pressure is what is recommended by the vehicle manufacturer and will be listed on either a door tag/door sill tag or sometimes it's found inside the fuel filler door. The recommended pressure IS NOT what's on the tire sidewall. This is a common misunderstanding. Without knowing the vehicle details one cannot say what the recommended pressure is.

-Rod

Agreed. Check when cold and to those numbers. Driving 20 feet will NOT make a difference. Driving for 20 minutes WILL likely make a difference. As a rule of thumb, the pressure changes 1psi for every 10 degrees in temp change. So, if you check it on an 80 degree summer day and not again until a 30 degree winter day, you should see a 5psi difference (lower). So, the same goes when you drive and warm the tire up. Generally, a tire may gain 2-4psi until it is warmed up.